2.4 Scanning Electron Microscopy (SEM) testing
Morphology of the LDPE/EVA blends was examined using scanning electron microscopy method (SEM, CamScan, MX 2000, UK). The cryo fractured surface of the LDPE/EVA blends was etched with xylene at 50 oC for 6 h in order to remove EVA phase. The etched surface was gold sputtered and taken within a magnification of 5000x. The LDPE/EVA films incorporated with 4% EOs had been fractured under liquid nitrogen before they were scanned within a magnification of 2000x.